In this article we discuss the basics of constraints and constraint queries.

Figure 1 - An example of a (main) query in combination with a constraint query, as shown within the query editor.

Queries are at the core of every view. They either get the data that needs to be presented or they determine how the full set of data needs to be constrained. The latter we call the constraint query and are typically used to give an asnwer to a so called "give me"-question. Please watch the below video to learn more.